<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>客户端</title>
</head>
<script type="text/javascript">
    var socket;
    if(window.WebSocket){
        socket = new WebSocket("ws://localhost:8899/ws");
        socket.onmessage = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value+"\n"+ev.data;
        };
        socket.onopen= function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = "连接开启";
        };
        socket.onclose= function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value+"\n"+"连接关闭";
        };
    }else {
        alert("不支持");
    }
    function send(mes) {
        if(!window.WebSocket){
            return ;
        }
        if(socket.readyState==WebSocket.OPEN){
            socket.send(mes);
        }else {
            alert("连接未开启");
        }
    }
</script>
<body>
<form onsubmit="return false;">
    <textarea name="message" style="width: 400px;height: 200px;"></textarea>
    <input type="button" value="发送数据" onclick="send(this.form.message.value)">
    <h3>服务端输出：</h3>
    <textarea id="responseText" style="width: 400px;height: 300px;"></textarea>
    <input type="button" onclick="javascript:document.getElementById('responseText').value=''" value="清空内容">
</form>
</body>
</html>